OverviewBefore you run the Exchange Calendar Update tool, refer to Microsoft Knowledge Base article 930879, “How to address daylight saving time by using the Exchange Calendar Update Tool,” for complete information about potential effects on your IT environment and user base.

After installing the Windows and Exchange daylight saving time (DST) updates, all old appointments (both recurring and single instance) that occur during the extended DST period will be incorrectly displayed as having moved back one hour. These appointments will need to be updated so that they display correctly in Outlook, Outlook Web Access, and CDO-based applications. The Outlook Time Zone Data Update Tool enables end-users to update their own calendars. (For Outlook 2007 the time zone update feature is built into the application.)

The Exchange Calendar Update Tool enables administrators to avoid the challenges involved with broadly deploying the Outlook tool to all users and ensuring that each user runs the tool correctly.

Paul is blogging a lot about this subject. If you’re concerned about DST changes, be sure to read his blog!

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Exchange Calendar Update Tool

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